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| Number | Title | Issue Date |
| 7392826 | Valve device and multiport regulating assembly comprising a plurality of such devices The present invention relates to a valve device for regulating a fluid, particularly a gaseous fluid, in a conduit portion, comprising a valve body fixed to a support spindle extending transversely into said portion and mounted with the ability to rotate therein, sa... | 07/01/2008 |
| 7198062 | Fluid control valve A valve is provided for controlling a flow of a fluid between a first environment and a second environment. The valve includes a frame adapted to fit within a perimeter of an aperture in a divider separating the first environment from the second environment. The val... | 04/03/2007 |
| 6929447 | Steam line closing valve and steam turbine plant comprising such a steam line closing valve The invention relates to a steam line closing valve for closing a steam line, especially in a steam turbine plant between a first partial turbine and at least one second partial turbine that is operated at a lower pressure than the first partial turbine. According t... | 08/16/2005 |
| 6817378 | Fluid flow control damper assembly A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, tha... | 11/16/2004 |
| 6557583 | Electric power modulated lead screw actuated dampers and methods of modulating their operation A damper assembly in which the position of the damper blades is controlled by an electric powered actuator. The powered actuator rotates a threaded lead screw shaft attached to an operator means attached to the damper blades of the damper, which causes th... | 05/06/2003 |
| 6499310 | Flow control device for a gas stream An airflow control device for air streams in a motor vehicle air-conditioning system includes an installation frame with pivotable lamellae (2) that are driven by an electric motor via a gear mechanism arranged on the outside of the frame. The gear mechan... | 12/31/2002 |
| 6418964 | Bearing-supported damper assembly A damper system has a frame within which a plurality of pivotally supported vanes are actuated by linkage rods pivotally connected to the vanes by rocker brackets and trunion pivots. The trunion pivots include bearing assemblies seated within bearing-rece... | 07/16/2002 |
| 6293306 | Throttle gate valve A throttle gate valve (10) including an upright, generally rectangular valve housing (12), in which is positioned a linearly movable gate valve (32) for closing off a thru-opening (15) formed in the lower part of housing (12). A pneumatic actuator assembl... | 09/25/2001 |
| 6099405 | Damper blade system A damper blade system for positioning proximate a duct includes a housing with two, opposing sides; a first damper blade; and a second damper blade. The first damper blade is rotatably supported between the two sides of the housing, and one end of the fir... | 08/08/2000 |
| 5938524 | Damper blade system A damper blade system for positioning proximate a duct includes a housing with two, opposing sides; a first damper blade; and a second damper blade. The first damper blade is rotatably supported between the two sides of the housing, and one end of the fir... | 08/17/1999 |
| 5580307 | Shutter for air or smoke conduits The air lock includes a frame, a passage port defined by the frame, a plurality of side by side tabs supported in a rotating manner by the frame and extending through the passage port as well as kinematic connections between the tabs to ensure simultaneou... | 12/03/1996 |
| 5425673 | Fire closure shutter A fire shutter comprises a plurality of substantially planar fire plate elements each having first and second opposite edges and supported so that they are adjacent to each other and turnable about respective parallel axes from a flow-through open positio... | 06/20/1995 |
| 5238453 | Integral pivot damper blade A damper blade is constructed with a laterally extending, rounded rib and with integral journals on opposite ends of the rib that form bearing surfaces when the blade is journaled in openings in the frame of a damper assembly. The construction provides fo... | 08/24/1993 |
| 5141026 | Pivoting shutter device for regulating an air flow passing through a heat exchanger A device for regulating the flow of air through a heat exchanger has a multiplicity of shutters pivotally mounted on parallel axes and actuated by control means that include an actuating plate which carries a number of cam tracks of selected shapes. Each ... | 08/25/1992 |
| 5103867 | Active reed valve An active reed valve for a fluid passage comprising a sealing means sealingly fixed to the passage walls, and a primary petal seat having a primary seat port and a downstream primary seat end. A flexible primary petal is sealingly attached to the primary ... | 04/14/1992 |
| 5007456 | Closing arrangement for ducts having large cross-sectional areas, particularly flue gas ducts A closing arrangement for ducts having large cross-sectional areas, particularly flue gas ducts for power plants. The arrangement includes at least two flaps which are mounted on at least one flap shaft. Lever arrangements composed of crank arms and tight... | 04/16/1991 |
| 4887641 | Modified parallel blade damper for an air handling system A multiple blade damper for an air handling system of the type in which at least an adjacent pair of blades of the damper are operated in parallel, that is, in which each of such pair of blades is oscillated in the same direction as the other of the pair ... | 12/19/1989 |
| 4823836 | Dampers with leaf spring seals A leaf spring seal to effect sealing contact between such members as a damper blade and a frame consists of a set of leaf springs having their inner portions held together by clamping components of which one is a bar and the other the inner portion of a l... | 04/25/1989 |
| 4610197 | Damper blade construction A hollow airfoil damper blade formed by sheet metal. The walls of the blade are formed by two sheets crimped together at the edges. The blade tapers from the center toward the edges and has two pairs of V-shaped stiffening ribs formed by corrugations in t... | 09/09/1986 |
| 4518012 | Air damper assembly with movable blades An air damper assembly has a frame which is mounted on the walls of an air flow passageway, with flanges extending inwardly from at least one pair of opposed sides of the frame. A plurality of elongated damper blades have their opposite ends extending int... | 05/21/1985 |
| 4506829 | Variable speed damper means Automatic damper means having damper blades rotatably mounted in an adjustable housing, said blades being rotatable between open and closed positions by electrically energized motor means and attaching rotating means; interchangeability of said rotating m... | 03/26/1985 |
| 4506825 | Solenoid operated damper blades Solenoid motor means for operating a multiple blade damper device; said blades being pivotally mounted in a common housing; said housing being constructed to reside in an open ended duct boot that is part of the duct network for the distribution of the he... | 03/26/1985 |
| 4493342 | Double louver damper A double louver damper for use in a duct system conveying hot gases and particles in order to permit safe entry to be made therein when servicing is required has a frame to be incorporated in the system. The frame has two parallel seals surrounding the fl... | 01/15/1985 |
| 4487214 | Damper blade actuating mechanism Damper blade actuator assembly for use in association with a damper having damper frame means adapted to be associated with an air duct system, and defining an air flow opening, and movable damper blade means operable for partially or completely obstructi... | 12/11/1984 |
| 4442862 | Link bar operator for rotating blade dampers An operator for rotating blade dampers including a frame and a plurality of interconnected blades adapted for rotation within the frame, which operator comprises a pair of pivotally interconnected members operatively associated with the blades of the damp... | 04/17/1984 |
| 4404990 | Economy, angle-blade damper kit A novel damper kit is described wherein blade stock having a hook-shaped hinge portion formed therein, and notched angle bracket stock having periodically spaced hook-shaped hinge elements formed therealong can easily be cut and assembled at the job site ... | 09/20/1983 |
| 4377350 | Pivot for damper assembly A cylindrical pivot for a multiblade damper assembly having at least three pivotally mounted blades is provided in which the blades are interlinked by connecting rods pivoted to brackets which are secured to each of the blades. Each bracket is formed with... | 03/22/1983 |
| 4372342 | Balancing damper with quick set adjustment bracket A damper for adjusting and balancing the air flow rates in air conditioning and similar large gas flow systems is disclosed which comprises at least one pivotable blade located in a frame which is capable of being fitted onto or into one of the ducts in s... | 02/08/1983 |
| 4338967 | Universal link bar operator and actuator for rotating blade air, smoke, and fire dampers A universal operator is disclosed for rotating blade air, smoke and fire dampers, said dampers comprising a frame and a plurality of interconnected blades within said frame, said interconnection being in the form of a link bar which adapts all of said bla... | 07/13/1982 |
| 4305427 | Damper assembly A multiblade damper assembly having at least three pivotally mounted blades is provided with means to interlink these blades in which a bracket is secured to each of the blades with each bracket being formed with a pair of parallel extension arms which ex... | 12/15/1981 |
| 4294283 | Wedge sealed damper A damper assembly comprising, in combination, a generally rectangular frame including side, top and bottom members, a plurality of damper blades supported at opposite ends on the side members of the frame for limited rotative movement about axes extending... | 10/13/1981 |
| 4274439 | Control valve having a disc shaped throttle The invention relates to a throttling valve with low noise. The passage of fluid is controlled by an aperture between parallel discs, which can be turned around special axes for altering the distance between them.... | 06/23/1981 |
| 4273156 | Shutoff device The shutoff device for closing a large cross-sectional area gas duct comprises a lock chamber defined by the gas duct walls and the two rows of swivel louvre grills held to the housing of the shutoff device which accommodates also a mechanical actuator, s... | 06/16/1981 |
| 4259987 | Linear damper system The damper system for controlling the flow of a gaseous fluid in a duct member is disclosed in which the combination of parallel and opposed flow characteristics is utilized to produce a composite rate of flow which varies substantially linearly with the ... | 04/07/1981 |
| 4256143 | Shut-off damper A shut-off damper comprising a line of blades which are supported in a surrounding frame for rotary motion about substantially parallel axes to open or close an opening in the frame, and springy sealing strips each provided with a lining or cover of synth... | 03/17/1981 |
| 4254795 | Airflow control mechanism insertable into an air duct The invention provides an air flow control mechanism adapted to be slideably insertable into an air duct without substantial structural modification of the air duct and without requiring shut down of the air system.... | 03/10/1981 |
| 4253492 | System for controlling the flow of gaseous fluids A duct, presumably that of a utility boiler or the like, has a frame mounted on its internal walls. Parallel louver blades are mounted in the frame and linked for simultaneous actuation to move the louver-blades between a first position where they seal th... | 03/03/1981 |
| 4249571 | Air control mechanism having noise suppression means The invention provides an airflow control mechanism for use in an air duct for controlling airflow through the duct. The air flow control mechanism includes a frame positionable in the duct, and a plurality of blades supported by the frame and extending t... | 02/10/1981 |
| 4244397 | Shut-off damper A shut-off damper having blades of a generally streamlined shape with the trailing edges of the blades comprising fluid sealing means extending along those edges so that a seal is formed between adjacent blades when the blades are in their closed position... | 01/13/1981 |
| 4191212 | Multiple blade damper assembly A damper assembly including a plurality of damper blades pivotable about parallel axes. Each blade includes a pair of parallel plates spaced apart by supporting members, the plates providing an open fluid passageway through the blade. When the damper blad... | 03/04/1980 |
